The story
- Proto-Indo-European*h₁órs-o-s
- Proto-Germanic*arsaz
- Proto-West Germanic*ars
- Old Englishears
- Middle Englishars
- Englishass
- Proto-Indo-European*swep-
- Proto-Indo-European*supnós
- Proto-Hellenic*húpnos
- Ancient Greekὕπνος (húpnos)
- Ancient Greekὑπνόω (hupnóō)
- Ancient Greekὕπνωσις (húpnōsis)
- Englishhypnosis
- English todayassnosis
Etymology from Wiktionary, CC BY-SA 4.0.